Can anyone explain to me why Firefox apparently can't seem to maintain its open tabs? In a world where every other browser appears to retain active tabs between sessions, it seems Firefox will permanently lose all of them if you so much as blow on it, i.e., inadvertently close a tabless window, effectively overwriting any previous window with the open tabs. At the very least, other browsers allow users to recover any lost tabs, and even entire windows of tabs, with little effort. The fact that this hasn't been addressed is perplexing.